CORRELATION OF THE LOWER TERTIARY STRATA OF WESTERN EUROPE. 
Switzerland. 
Aquitanian Stage 
and 
Lower Brown-coal 
Formation. 
Upper Marine Molasse 
(Tongrian). 
Lower Marine Molasse 
(Ligurian). 
Nummulitic Strata 
and Flysch. 
Lower Eocene 
Sandstone. 
Northern Germany. 
Fossiliferous Strata of 
Osnabriick, Cassel, &c. 
Brown Coal of 
Rhenish Prussia. 
Septarian Clay. 
Marine Sand of 
Mayence Basin. 
Brown-coal Formation. 
Fossiliferous Beds of 
Egeln, Magdeburg, 
&c. 
Great Brown-coal 
Formation. 
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Beds of Maestricht. 
‘ Rup61ien.’ 
‘ Tongrien Superior.’ 
(Kleyn Spawen Beds.) 
‘ Tongrien Inferior.’ 
• 
‘ Laekenien.’ 
* Bruxellien,’ 
* Ypresien.’ 
‘ Landenien.’ 
‘ Heersien.’ 
Limestone of Mons. 
Paris Basin. 
Freshwater Limestone 
of Beauce. 
Fontainebleau 
Sandstone. 
Gypsum of 
Montmartre. 
Cerithium concavum. 
Beds of Mortefontaine, 
&c. 
Sands of Beauchamp. 
* Calcaire Grossier.’ 
Sands of Soissons. 
Plastic Clay. 
Strata of Meudon, 
Rilly, and Nemours. 
Hampshire Basin. 
Hempstead Series. 
Bembridge Group. 
Brockenhurst Series. 
Headon Group. 
Barton Clay.' 
Bracklesham Series 
and 
Bournemouth Beds. 
Bognor Beds. 
Plastic Clay. 
London Basin. 
Bagshot Series. 
London Clay. 
Oldhaven Beds. 
Woolwich and 
Reading Beds. 
Thanet Sand. 
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